Convert MOBI to PDF Mobipocket ↔ Portable Document Format Free Online Secure
The book is unpacked here in your browser and printed chapter by chapter. The text stays selectable, because the PDF is made by your browser's own print dialog.
Convert your file
Drop a .mobi here, or choose one.
Your file never leaves this device. Everything runs in your browser.
Nothing uploaded
Convert from MOBI
Convert to MOBI
Where these formats come from
An EPUB is, underneath, a zipped website: pages of HTML with a stylesheet and a table of contents. That is why text in an e-book reflows — the reader chooses the type size and the words rearrange themselves, exactly as they do in a browser window. MOBI came from Mobipocket, a French company Amazon bought in 2005; it became the first Kindle format and was retired by Amazon in 2022 in favour of EPUB. The contrast with PDF is the whole story of this family: a PDF holds fixed pages, laid out once and never moved, while an e-book holds text that has no pages until a reader opens it.
Where you meet them
EPUB is what every e-reader except the Kindle expects, what public libraries lend, and what most publishers produce. MOBI is for older Kindles and for archives of books bought before the change. Converting a PDF into either is the usual way to get a report, a manual or an out-of-print scan onto a reading device where the text can be made larger.
Questions people ask
Why does my PDF look messy after converting to EPUB?
Because the two work in opposite ways. A PDF knows where every word sits on a fixed page; an EPUB has to be told what is a heading, what is a paragraph and what order it all comes in, and none of that is recorded in a PDF. The converter infers it from position and size, and does well with plain single-column text. Two columns, footnotes, headers repeated on every page, tables and figures with captions are where the guessing shows, and they usually need tidying by hand.
Should I still use MOBI?
Only for an old device that cannot read anything else. Amazon stopped accepting MOBI for sending documents to Kindle in 2022 and now wants EPUB, which modern Kindles handle directly. If you are choosing today, choose EPUB: it is the format libraries lend, publishers produce and every reader but the oldest understands.
Does the file lose quality?
It depends on what the two formats can hold. Converting between formats that store the same thing — a PNG to a BMP, a WAV to a FLAC — loses nothing. Converting into a format that throws information away to save space, such as JPEG or MP3, loses a little every time, and converting back does not bring it back. Where a choice exists, this page errs towards keeping the original quality rather than making the smallest file.
Is my file uploaded anywhere?
No. The conversion happens inside your browser, on your own machine; the file never leaves it and there is no server here that could receive it. That is why a large file is limited by your own memory rather than by an upload, and why nothing you convert can appear in anybody's logs — including ours. The audio and video tools do fetch their conversion engine from this site the first time you use them, some thirty megabytes once; after that the work still happens entirely on your machine.
Why people convert MOBI to PDF
MOBI is the old e-book format of the Kindle world. If you have collected books over the years, perhaps from libraries, free classics, purchases made long ago or files sent by friends, you may have a folder of .mobi files that nothing on your computer can open. Newer devices and apps have moved on to other formats, and many programs no longer read MOBI at all. A PDF, by contrast, opens everywhere, prints exactly as it appears, can be annotated and can be filed alongside every other document you own. That is why people convert MOBI to PDF: they want to read, print or keep a book that is stuck in an old format.
The reasons are practical. A student needs a chapter on paper. A reader wants to open an old book on a computer or a tablet that no longer supports MOBI. A researcher wants to search the full text of a book with a PDF tool. An author or editor needs a PDF to proof or share a book written for Kindle. Whatever the case, the job is to take a book made for a screen that reflows and turn it into fixed pages, and converting MOBI to PDF does exactly that.
This page converts MOBI to PDF in your browser. The book is unpacked right here, on your device, and not uploaded to a server, which matters for private documents and manuscripts. Below you will find how the chapters become pages, what is kept, what cannot be read and why, and how to get a clean result.
How the book becomes pages
Unpacked here and printed chapter by chapter
The book is unpacked in your browser and printed chapter by chapter. A MOBI file is a package: it holds the text of the book, the images and some information about the title and author, all wrapped up in a form designed for Kindle devices. The converter opens that package, reads the chapters in the book's own order and lays them out as pages, one chapter after another.
The text stays selectable
The text in the PDF stays text, so it remains selectable and searchable. This is because the PDF is made by your browser's own print dialog, not by turning pages into pictures. You can search the whole book for a word, copy a quotation, highlight a passage and use a screen reader. The file also stays far smaller than a stack of page images would be.
Why the browser's print dialog is used
Your browser already knows how to draw text in any language with the fonts on your device, and how to write it into a PDF. Building on that gives real text in any script. It also means a print window opens when you convert, and you choose "Save as PDF" as the destination, not a printer.
What is kept
Chapters, headings, lists, tables and pictures
When you convert MOBI to PDF here, the chapters stay in the book's own order, and headings, lists, tables and pictures are kept. The structure of the book survives: a heading is a heading, a list is a list, a table keeps its rows and columns and illustrations appear where the author put them.
Title and author
The title and author stored inside the file come along too. That gives the PDF a sensible identity, so it is easy to recognise in a folder or a library, instead of appearing under a meaningless file name.
What cannot be read
Books with DRM
A book with DRM cannot be read. DRM is copy protection: the text is encrypted with a key tied to a particular device or account, so that the book can be read only there. This converter does not break that protection, and it will not open such a book. If a book you bought is locked, it is meant to be read in the app or on the device it was bought for.
This is not a limitation to work around; it is a boundary of what this page does. Use books that you own in an unprotected form: free classics, your own writing, files from sources that do not lock them, and books whose publisher provides a DRM-free file.
Amazon's Huffman compression
Some MOBI files are packed with a compression scheme that Amazon uses, called Huffman compression. Such files are recognised, so you will be told what the problem is, but they are not decoded, and the book cannot be converted. If you meet this message, the file needs to be handled by a tool built for it, or you should obtain the book in another format.
What the message means
It means the converter understood the file, but not the compression used inside it. It is not a sign that your file is damaged. The book may open normally on a Kindle or in a Kindle app, and a different tool, or a different version of the book, may convert it.
What is deliberately not applied
The book's own stylesheet
The book's own stylesheet is not applied. An e-book is written to reflow on a screen of unknown size, and its margins and type sizes, on paper, would read worse than the clean layout used here. The PDF will therefore not look exactly like the book on your Kindle, but the words, order and structure are the same.
Pop-up footnotes
Pop-up footnotes, the small windows that appear when you tap a marker in an e-reader, do not exist on paper and are not carried across. The text of the notes remains in the book's content, where the book puts it, but the pop-up behaviour is lost.
What a MOBI file is
MOBI began with a small company called Mobipocket and became the format of Amazon's early Kindle devices. Inside, a MOBI is a database-like package: the text of the book split into records, the images, a few lines of information about title and author and, depending on how the book was made, a layer of compression or protection. It was designed for the limited devices of its day, which is why it is compact and, by modern standards, restrictive. Over time, Amazon moved to newer formats, and many apps and devices that once read MOBI stopped doing so.
That history explains why so many people find themselves with MOBI files they cannot open. The books are fine; the world around them has moved. When you convert MOBI to PDF, you move the book into a format that has not gone out of fashion and is not likely to, because PDF is the common language of documents on every system.
MOBI compared with EPUB
EPUB is the open successor in most of the e-book world, and Kindle devices now read it as well. If you have the choice of getting a book as EPUB or MOBI, EPUB is generally the better file. For books that exist only as MOBI, this converter gives you a path to PDF, and from PDF to almost anything else.
Free books and your own writing
Plenty of MOBI files are perfectly free to open: classics in the public domain, books that authors give away, documents you wrote yourself and exported for Kindle, manuals and guides distributed without protection. These are the files this page is for, and they convert without trouble. If you have a collection of such books, converting them to PDF is a good way to keep them readable for the long term, whatever happens to Kindle formats.
Check one book first. Convert MOBI to PDF, scroll through and look at the chapters, the pictures and the tables. If it looks right, the rest of the collection from the same source will behave the same way, and you can convert them in turn, keeping the MOBI originals as the archive copy.
If the book is DRM-locked
If you bought a book from a store and it will not convert, DRM is the likely cause. The book is meant to be read in the store's own app or on its own device. Look in the store for a way to read it on other devices, or contact the publisher for an unprotected version. This page does not unlock protected books.
Printing and annotating
Once a book is a PDF, you have the full range of PDF tools. You can print a chapter, or the whole book two pages to a sheet. You can annotate it with highlights and notes, search it for any word and copy passages into your own notes. For study, research or review, a PDF of a book is a much more capable working copy than a Kindle file, and it travels to any device without special software.
If you need only part of the book, for example a single chapter for a class, convert MOBI to PDF and then extract the pages you need. You will have a short, clean file that is easy to print and share, and the full book remains safe in its original form.
Front matter and cover
Books made for Kindle often begin with a cover image, a title page and several lines of legal text. They come through in the order the book declares and take up the first pages of the PDF. If you do not want them, remove those pages after converting, or simply start reading after them.
How to convert MOBI to PDF here
Add your book
Drop the .mobi file onto the page or pick it from your device. It is unpacked inside your browser and is not uploaded.
Start the conversion
Press the button. Your browser's print window opens with the chapters laid out page by page.
Choose Save as PDF
In the print window, set the destination to "Save as PDF" rather than a printer, and save. Open the result and scroll through: check the first chapter, a page with a table or picture and the last chapter.
Questions people ask before converting
Why does my book not open?
If it is locked with DRM, or packed with Amazon's Huffman compression, this converter cannot read it. DRM protects the book from being copied and is not something this page removes.
Is the text selectable?
Yes. The PDF is made by your browser's print dialog, so text stays text, selectable and searchable.
Why does the PDF look different from my Kindle?
Because the book's stylesheet is not applied; it is written for reflowing screens, and on paper it would read worse.
Is my book uploaded?
No. Everything runs in your browser and the file never leaves your device.
Who converts MOBI to PDF
People with old e-book collections
Libraries of MOBI files built over the years become readable on any device as PDFs.
Students and researchers
A searchable, annotatable PDF is a far better working copy of a book than an e-reader file.
Authors and editors
A PDF is the simplest way to share a book written for Kindle with a reviewer.
Common mistakes
Trying a DRM-locked book
It cannot be read. Use files you can open freely.
Choosing a printer in the print window
Pick "Save as PDF" as the destination, or the book goes to paper instead of a file.
Expecting the Kindle look
The stylesheet is not applied. The PDF has its own clean layout.
Related tools
For the more common e-book format, convert EPUB to PDF. To go the other way, convert PDF to MOBI or PDF to EPUB. Once you have the PDF you can split it into chapters, compress it or add page numbers. For web pages and documents, convert HTML to PDF and DOCX to PDF do the equivalent job.
When to convert MOBI to PDF, and when not to
Converting is right when you need fixed pages: to print, to annotate, to file, to read on a device that no longer supports MOBI or to share with someone who cannot open it. It is the wrong move when the book is DRM-locked or compressed in a way the converter cannot decode, and it is unnecessary when your device still reads MOBI and you simply want to read in comfort on a reflowing screen.
For the common cases, such as free books, your own writing, reference books and old collections, it is quick, private and dependable to convert MOBI to PDF in the browser. Your original is never changed, so you can come back and convert MOBI to PDF again whenever you like.
Large books and slow devices
Everything runs on your own device, so very large books depend on its memory. A novel is no trouble for a modern computer. A very large illustrated book may be slow on an older phone. If it struggles, give the browser a moment and avoid switching to other apps while it works.
Keeping the PDF a sensible size
PDFs made from text-heavy books are small. If your book has many large pictures, the PDF can be big, and you may want to compress it before emailing it. Check the result at normal zoom afterwards to be sure the pictures still look right.
Checking the result properly
After you convert MOBI to PDF, scroll through the whole file at normal zoom. Check the first chapter, a page with a table or a picture and the last chapter. Look for chapters in the wrong order, missing pictures and pages that are mostly empty. If everything reads well, the PDF is ready to print, annotate or share.
A simple routine to convert MOBI to PDF well
Make sure the book is one you can open freely. Convert MOBI to PDF, and in the print window choose Save as PDF. Scroll through the result and check chapters, pictures and tables. If you need only part of the book, extract those pages. Keep the PDF with your notes and the MOBI as your original. This routine takes a couple of minutes, and it works whether you convert MOBI to PDF once a term or every week.
Your book stays on your device
The conversion happens locally. Your book is unpacked by your own browser and turned into a PDF through its own print dialog. Nothing is uploaded, so there is no copy on a server and no one else who could see it. For manuscripts and private documents, that is the safe way to convert MOBI to PDF.
A worked example
Say you have an old MOBI of a classic novel that your current devices cannot open, and you want to read it on a tablet. You drop the file here, press the button and choose Save as PDF in the print window. You open the PDF: the chapters appear in order, each on a new page, the title and author are set and the text is selectable. You copy the PDF to your tablet and read it there.
Before you close the page
Check that you saved a PDF and not a printout, that the chapters are present and in order, and that you kept the original MOBI.
Summary
To convert MOBI to PDF here, drop the file, press the button and choose Save as PDF in the print window. The book is unpacked in your browser and printed chapter by chapter, with headings, lists, tables, pictures and the stored title and author kept, and the text stays selectable and searchable. A book with DRM cannot be read, files packed with Amazon's Huffman compression are recognised but not decoded, and the book's stylesheet and pop-up footnotes are not carried over. Nothing leaves your device.